31:1
There is no rm 125 fourstroke they make a drz.
120mm from the top
32 TO 1
36:1
it is 50 to one with mc 1 oil
Castol TTS Oil Mixed at 40:1
700cc / .73qt
These (link below) are for a 08 RM 125.
castrol tts 40:10
Will a 94 rm 125 engine fit on a 2000 rm frame?
If you are talking a RM 125 then I would use Redline shockproof gear oil ......IT IS AMAZING.